Github user HyukjinKwon commented on a diff in the pull request: https://github.com/apache/spark/pull/22688#discussion_r224341077 --- Diff: sql/core/src/test/scala/org/apache/spark/sql/sources/v2/SimpleWritableDataSource.scala --- @@ -116,7 +116,6 @@ class SimpleWritableDataSource extends DataSourceV2 schema: StructType, mode: SaveMode, options: DataSourceOptions): Optional[BatchWriteSupport] = { - assert(DataType.equalsStructurally(schema.asNullable, this.schema.asNullable)) --- End diff -- Yea .. but it's in test code and just sanity check..
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